4.5 von neumman architecture Flashcards
why is using cloud storage over local storage more preferred?
files can be accessed from anywhere in the world with an internet connection.
it is easier to collaborate as you can access the same file and share files.
it allows back of of files and they are kept secure.
why should computers have a sufficient amount of RAM?
more programs load from secondary storage into RAM so they can be executed by the processor.
how is main memory used?
stores data and instructions whilst a program is being executed.
each uniques memory location holds one value.
every memory location has a unique address.
how is an optical disk read?
disk rotates.
laser head moves across the disk.
laser shines on the disk.
reflecting light is interpreted as 0s and 1s representing data stored on the disk.
what is an embedded system?
does a dedicated function which is built into a physical device
how does a HDD operate?
can contain multiple platters.
disk that spins.
each platter is divided into sectors.
head moves across the surface to read and write data.
how does the number of cores affect the CPU performance?
affects the number of instructions that can be executed simultaneously as each core fetches and executes its own instruction
how does the clock speed affect the CPU performance?
more pulses means more fetch-execute cycles execute per second so more instructions are executed per second
what are the differences between an embedded system (ES) and non-embedded system (NES)?
ESs have a specific purpose while NESs are general-purpose.
ESs have smaller amounts of memory that NESs.
how does a HDD operate?
multiple platters, disks spin, each platter is divided into sectors, read/write head reads and writes data
